What is SAP(Sodium L-ascorbyl-2-phosphate) ? Sodium Ascorbyl Phosphate is an active ingredient for sophisticated cosmetic skin care products. It is a stable vitamin C derivative. It protects the skin, promotes its development and improves is appearance.Sodium Ascorbyl Phosphate is cleaved enzymatically in the skin to release active vitamin C. Sodium Ascorbyl Phosphate is therefore an effective antioxidant which protects the …